The Clamp,block, cataloged under National Stock Number 5340-01-543-5435, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Sonfarrel Inc.. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-01-543-5435 |
| Primary Part Number | SF891741 |
| Item Name | Clamp,block |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Sonfarrel Inc. |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Unit of Issue | EA |
| Part Number | Manufacturer |
|---|---|
| SF891741 PRIMARY | Sonfarrel Inc. (USA) |
| Reference | Meaning |
|---|---|
| 9D0320-1 | 5/2 Secondary reference U.S. Government activity |
| G-8445 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5340-01-543-5435 is a Clamp,block, manufactured by Sonfarrel Inc., classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-543-5435 has 1 manufacturer part number on file: SF891741 (Sonfarrel Inc.).
1 possible match (shared part number, not a government interchangeability claim): 5330-01-733-4728. Verify interchangeability with system specifications before substitution.
Key specifications for SF891741: Part Name Assigned by Controlling Agency: C-17A AIRCRAFT A; End Item Identification: CLAMP, BLOCK. 0 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.